See one sooner than feels necessary: fit checks, output drops, pain, and back-to-work plans are all one-visit problems caught early. In the US, insurers must cover lactation support under most plans, and many IBCLCs do telehealth with you and your pump on camera.
Every bag and bottle you add gets its best-by and use-by dates computed automatically from these exact rules, the oldest safe milk sits on top of the Use next queue, and a warning arrives the day before anything expires, while you can still act.
Milk First speaks this whole language for you: seshes logged in two taps, every bag on its correct clock.
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